671091413 has 2 divisors, whose sum is σ = 671091414. Its totient is φ = 671091412.

The previous prime is 671091391. The next prime is 671091461. The reversal of 671091413 is 314190176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541632529 + 129458884 = 23273^2 + 11378^2 .

It is a cyclic number.

It is not a de Polignac number, because 671091413 - 2²² = 666897109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671091413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671091313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335545706 + 335545707.

It is an arithmetic number, because the mean of its divisors is an integer number (335545707).

Almost surely, 2^671091413 is an apocalyptic number.

It is an amenable number.

671091413 is a deficient number, since it is larger than the sum of its proper divisors (1).

671091413 is an equidigital number, since it uses as much as digits as its factorization.

671091413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 671091413 is about 25905.4321137479. The cubic root of 671091413 is about 875.5088905896.

The spelling of 671091413 in words is "six hundred seventy-one million, ninety-one thousand, four hundred thirteen".